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China 3 7/8" drain valve drill stem testing tools manufacturer


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3 7/8" drain valve drill stem testing tools 

Price: 1000.0 USD 
Payment Terms: T/T,L/C,D/A 
Special Groups: Case hole DST (111)
DST Sleeve type drain valve (4)
drill stem testing (124)
Sleeve type drain valve (3)
Place of Origin: Shaanxi, China (Mainland) 
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Product Detail

Model No.: 3 7/8" Drain Valve
Production Capacity: 5 pcs/month
Delivery Date: 7 days
Type: APR drill stem testing tool...
service: H2S
Working condition: High pressure high temperat...
Material: AISI 4140
Means of Transport: Ocean,Land,Air
Packing: polywood case
Application: oil well testing
working pressure: 105 Mpa
standard: NACE MR0175
Size: 3 7/8"
Brand: ZZTOP

The 3 7/8" x 15000 psi sleeve type drain valve is used for slim hole drill stem testing operation in cased hole, it is as per NACE MR 0175 standards

3 7/8" Sleeve type drain valve

3 7/8" Drill stem testing tools for slim hole


Sleeve type drain valve is used for lofting after completing pipe string test, before running, the loft hole in sleeve drain is 

sealed by two sets of O-ring, sleeve drain and nut drain are stumbled by two screws. During running operation, sleeve 

drain will not be loose, after the test, connecting u the loft clamp, turn the nut drain and make sleeve drain move upward,

when connecting the bore mandrel to the loft hole of sleeve drain, lofting can be achieved.


3 7/8" DST Sleeve type drain valve




Drift diameter:



1159 mm

Working pressure: 

15000 psi(105Mpa)

Working temperature:

 -29oC ~ +177 oC

Tension strength: 

   140 Mpa

Outer pressure resistance

  130 Mpa

Torque strength: 




5x 10000psi Hydro spring tester MFE open hole drill stem testing

DST tools testing preparation
5x 10000psi Hydro spring tester MFE open hole drill stem testing


Drain valve function test chart
5x 15K psi Sleeve Type Drain Valve drill stem testing




ZZ TOP OIL TOOLS is the professional manufacturer for the drill stem testing tools and surface testing equipment. All the DST tools are conformed with NACE MR 0175 with traceability,and the DST tools can be worked in H2S & CO2 above 175 F and full H2S, also with the skilled and experienced engineers, we can design the drill stem testing tools as per customer's well condition. Moreover, we supply the training in our factory and operation instruction at the well site. The DST tools are exported to USA, Colombia, India, Pakistan, Iran, Brazil etc. and enjoy the good reputation from the customers.

Ms. Elaine
skype Ms. Elaine

Tel: 86-29-81779342
Mobile: 136 2920 7466
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Company Info

XI'AN ZZ TOP OIL TOOLS CO.,LTD [China (Mainland)]

Business Type:Manufacturer, Distributor/Wholesaler, Service
City: Xi'an
Province/State: Shaanxi
Country/Region: China (Mainland)

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zztopoiltools:   skype

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